The famous boat that once ferried Bogart and Hepburn still floats in Key Largo after being abandoned for years.

The Emperor Tiberius' palace of debauchery.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

Once the path of a railway tunnel, now home to thousands of glowing insects.

A hillbilly theme park that proved so unpopular the land wouldn't even sell on eBay after it closed.

The trials and tribulations of marking Poe's grave.

"You don't need a rocket scientist to build a steam engine, but we've got one." -Museum docent on the credentials of a restoration volunteer.

An isolated beacon with a history of grisly murder and a view of some of literature's greatest inspirations.

This demolished goliath of American industry once loomed over the depressed town it once made thrive.

Decommissioned NYC subway cars are dumped into the ocean to create this underwater wildlife habitat.

A market for witches is hidden within a train station.

A unrivaled and rather horrifying collection of wax dermatological models.

The phone booths of New York City have all but disappeared, but their remains were once found in this "graveyard," sadly now removed as well.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

The artwork that Italians felt California didn't deserve.

Very likely the only museum in the world that celebrates the glory of the humble banjo.

Legends surround an ancient tree trunk riddled with nails for good luck.

An underground city of ancient quarry tunnels hid thousands of Allied soldiers in WWI.

During an annual Catholic feast in this tiny Spanish village, men dressed as devils leap over rows of babies to cleanse them of sin.

A clear blue swimming hole with hidden caves, still unexplored.

This former steel and coal plant is now a neon-lit industrial fantasia.

A lighthouse built to save lives that took quite a few with its treacherous location.

Public outcry led to this bridge's unique character which celebrates a giant frog battle and also sewing.